[INFO] fetching crate heckcheck 2.0.1...
[INFO] testing heckcheck-2.0.1 against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210-1
[INFO] extracting crate heckcheck 2.0.1 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate heckcheck 2.0.1
[INFO] finished tweaking crates.io crate heckcheck 2.0.1
[INFO] tweaked toml for crates.io crate heckcheck 2.0.1 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate heckcheck 2.0.1 on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 17 packages to latest compatible versions
[INFO] [stderr]       Adding base64 v0.13.1 (available: v0.22.1)
[INFO] [stderr]       Adding rand v0.8.5 (available: v0.10.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e4c3624bb523840d2ef4c21391c53583f2ff33fa317fc3f0a9658e9822f96ea2
[INFO] running `Command { std: "docker" "start" "-a" "e4c3624bb523840d2ef4c21391c53583f2ff33fa317fc3f0a9658e9822f96ea2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e4c3624bb523840d2ef4c21391c53583f2ff33fa317fc3f0a9658e9822f96ea2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4c3624bb523840d2ef4c21391c53583f2ff33fa317fc3f0a9658e9822f96ea2", kill_on_drop: false }`
[INFO] [stdout] e4c3624bb523840d2ef4c21391c53583f2ff33fa317fc3f0a9658e9822f96ea2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4f3fec1d753dcc0db6aefd6824f029f701436c3e425307b96061d1116b5a713b
[INFO] running `Command { std: "docker" "start" "-a" "4f3fec1d753dcc0db6aefd6824f029f701436c3e425307b96061d1116b5a713b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.184
[INFO] [stderr]    Compiling quote v1.0.45
[INFO] [stderr]    Compiling zerocopy v0.8.48
[INFO] [stderr]    Compiling base64 v0.13.1
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling getrandom v0.2.17
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling derive_arbitrary v1.4.2
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling arbitrary v1.4.2
[INFO] [stderr]    Compiling heckcheck v2.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `ZeroShrinker` is never constructed
[INFO] [stdout]   --> src/shrinker.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | struct ZeroShrinker {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `find_next_index_to_zeroify` is never used
[INFO] [stdout]   --> src/shrinker.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | impl ZeroShrinker {
[INFO] [stdout]    | ----------------- method in this implementation
[INFO] [stdout] 45 |     /// Find the next index to alter, skipping indices that already contain zeroes.
[INFO] [stdout] 46 |     fn find_next_index_to_zeroify(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.71s
[INFO] running `Command { std: "docker" "inspect" "4f3fec1d753dcc0db6aefd6824f029f701436c3e425307b96061d1116b5a713b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f3fec1d753dcc0db6aefd6824f029f701436c3e425307b96061d1116b5a713b", kill_on_drop: false }`
[INFO] [stdout] 4f3fec1d753dcc0db6aefd6824f029f701436c3e425307b96061d1116b5a713b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b326de15df5c837e4119e00b34f5f7c985ccab9e0ac0df274637993db145cef5
[INFO] running `Command { std: "docker" "start" "-a" "b326de15df5c837e4119e00b34f5f7c985ccab9e0ac0df274637993db145cef5", kill_on_drop: false }`
[INFO] [stdout] warning: struct `ZeroShrinker` is never constructed
[INFO] [stdout]   --> src/shrinker.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | struct ZeroShrinker {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `find_next_index_to_zeroify` is never used
[INFO] [stdout]   --> src/shrinker.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | impl ZeroShrinker {
[INFO] [stdout]    | ----------------- method in this implementation
[INFO] [stdout] 45 |     /// Find the next index to alter, skipping indices that already contain zeroes.
[INFO] [stdout] 46 |     fn find_next_index_to_zeroify(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling heckcheck v2.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `ZeroShrinker` is never constructed
[INFO] [stdout]   --> src/shrinker.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | struct ZeroShrinker {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `find_next_index_to_zeroify` is never used
[INFO] [stdout]   --> src/shrinker.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | impl ZeroShrinker {
[INFO] [stdout]    | ----------------- method in this implementation
[INFO] [stdout] 45 |     /// Find the next index to alter, skipping indices that already contain zeroes.
[INFO] [stdout] 46 |     fn find_next_index_to_zeroify(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `Command { std: "docker" "inspect" "b326de15df5c837e4119e00b34f5f7c985ccab9e0ac0df274637993db145cef5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b326de15df5c837e4119e00b34f5f7c985ccab9e0ac0df274637993db145cef5", kill_on_drop: false }`
[INFO] [stdout] b326de15df5c837e4119e00b34f5f7c985ccab9e0ac0df274637993db145cef5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 3752d531a90edb156493484beb22b273d5485b14973f1a818a78a26290a750a4
[INFO] running `Command { std: "docker" "start" "-a" "3752d531a90edb156493484beb22b273d5485b14973f1a818a78a26290a750a4", kill_on_drop: false }`
[INFO] [stderr] warning: struct `ZeroShrinker` is never constructed
[INFO] [stderr]   --> src/shrinker.rs:38:8
[INFO] [stderr]    |
[INFO] [stderr] 38 | struct ZeroShrinker {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method `find_next_index_to_zeroify` is never used
[INFO] [stderr]   --> src/shrinker.rs:46:8
[INFO] [stderr]    |
[INFO] [stderr] 44 | impl ZeroShrinker {
[INFO] [stderr]    | ----------------- method in this implementation
[INFO] [stderr] 45 |     /// Find the next index to alter, skipping indices that already contain zeroes.
[INFO] [stderr] 46 |     fn find_next_index_to_zeroify(&mut self) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `heckcheck` (lib) generated 2 warnings
[INFO] [stderr] warning: `heckcheck` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/heckcheck-d3a2a1c25994fbe8)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/test.rs (/opt/rustwide/target/debug/deps/test-16e4cbfdb3e05d5a)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test smoke ... ok
[INFO] [stdout] test panics_on_bug - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests heckcheck
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 82) ... ok
[INFO] [stdout] test src/lib.rs - (line 17) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.34s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "3752d531a90edb156493484beb22b273d5485b14973f1a818a78a26290a750a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3752d531a90edb156493484beb22b273d5485b14973f1a818a78a26290a750a4", kill_on_drop: false }`
[INFO] [stdout] 3752d531a90edb156493484beb22b273d5485b14973f1a818a78a26290a750a4